Synthesis of some new tetracyclic heteroaromatic chromans via quinone methide intermediates
作者:Mohinder S. Chauhan、David M. McKinnon
DOI:10.1139/v81-321
日期:1981.7.15
Synthesis of several new tetracyclic heteroaromatic chromans has been achieved through the reaction of various uracil and 1,3-thiazine derivatives with 1,2-naphthoquinone-1-methide. The spirodimer 4 is a better source of naphthoquinone methide than the naphthol derivatives which provide chromans in low yield due to side reactions. The structure and mechanisms of the various products formed are discussed